1/*
2 * Copyright (C) 2007-2009 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32#include "bindings/core/v8/ScheduledAction.h"
33
34#include "bindings/core/v8/ScriptController.h"
35#include "bindings/core/v8/ScriptSourceCode.h"
36#include "bindings/core/v8/V8Binding.h"
37#include "bindings/core/v8/V8GCController.h"
38#include "bindings/core/v8/V8ScriptRunner.h"
39#include "core/dom/Document.h"
40#include "core/dom/ExecutionContext.h"
41#include "core/frame/LocalFrame.h"
42#include "core/workers/WorkerGlobalScope.h"
43#include "core/workers/WorkerThread.h"
44#include "platform/Logging.h"
45#include "platform/TraceEvent.h"
46
47namespace blink {
48
49ScheduledAction::ScheduledAction(ScriptState* scriptState, v8::Handle<v8::Function> function, int argc, v8::Handle<v8::Value> argv[], v8::Isolate* isolate)
50    : m_scriptState(scriptState)
51    , m_function(isolate, function)
52    , m_info(isolate)
53    , m_code(String(), KURL(), TextPosition::belowRangePosition())
54{
55    m_info.ReserveCapacity(argc);
56    for (int i = 0; i < argc; ++i)
57        m_info.Append(argv[i]);
58}
59
60ScheduledAction::ScheduledAction(ScriptState* scriptState, const String& code, const KURL& url, v8::Isolate* isolate)
61    : m_scriptState(scriptState)
62    , m_info(isolate)
63    , m_code(code, url)
64{
65}
66
67ScheduledAction::~ScheduledAction()
68{
69}
70
71void ScheduledAction::execute(ExecutionContext* context)
72{
73    if (context->isDocument()) {
74        LocalFrame* frame = toDocument(context)->frame();
75        if (!frame) {
76            WTF_LOG(Timers, "ScheduledAction::execute %p: no frame", this);
77            return;
78        }
79        if (!frame->script().canExecuteScripts(AboutToExecuteScript)) {
80            WTF_LOG(Timers, "ScheduledAction::execute %p: frame can not execute scripts", this);
81            return;
82        }
83        execute(frame);
84    } else {
85        WTF_LOG(Timers, "ScheduledAction::execute %p: worker scope", this);
86        execute(toWorkerGlobalScope(context));
87    }
88}
89
90void ScheduledAction::execute(LocalFrame* frame)
91{
92    if (m_scriptState->contextIsValid()) {
93        WTF_LOG(Timers, "ScheduledAction::execute %p: context is empty", this);
94        return;
95    }
96
97    TRACE_EVENT0("v8", "ScheduledAction::execute");
98    ScriptState::Scope scope(m_scriptState.get());
99    if (!m_function.isEmpty()) {
100        WTF_LOG(Timers, "ScheduledAction::execute %p: have function", this);
101        Vector<v8::Handle<v8::Value> > info;
102        createLocalHandlesForArgs(&info);
103        frame->script().callFunction(m_function.newLocal(m_scriptState->isolate()), m_scriptState->context()->Global(), info.size(), info.data());
104    } else {
105        WTF_LOG(Timers, "ScheduledAction::execute %p: executing from source", this);
106        frame->script().executeScriptAndReturnValue(m_scriptState->context(), ScriptSourceCode(m_code));
107    }
108
109    // The frame might be invalid at this point because JavaScript could have released it.
110}
111
112void ScheduledAction::execute(WorkerGlobalScope* worker)
113{
114    ASSERT(worker->thread()->isCurrentThread());
115    ASSERT(!m_scriptState->contextIsValid());
116    if (!m_function.isEmpty()) {
117        ScriptState::Scope scope(m_scriptState.get());
118        Vector<v8::Handle<v8::Value> > info;
119        createLocalHandlesForArgs(&info);
120        V8ScriptRunner::callFunction(m_function.newLocal(m_scriptState->isolate()), worker, m_scriptState->context()->Global(), info.size(), info.data(), m_scriptState->isolate());
121    } else {
122        worker->script()->evaluate(m_code);
123    }
124}
125
126void ScheduledAction::createLocalHandlesForArgs(Vector<v8::Handle<v8::Value> >* handles)
127{
128    handles->reserveCapacity(m_info.Size());
129    for (size_t i = 0; i < m_info.Size(); ++i)
130        handles->append(m_info.Get(i));
131}
132
133} // namespace blink
134